According to Katsunori Shigeta [1], 7-Eleven belatedly removed the target email address... using CSS (`display:none`). The summoned official had also said that

According to Katsunori Shigeta [1], 7-Eleven belatedly removed the target email address... using CSS (`display:none`). The summoned official had also said that one has no knowledge about the multi-factor authentication [2]. [1] https://twitter.com/shigezo/status/1146700322460463104 https://twitter.com/shigezo/status/1146700322460463104 [2] https://twitter.com/shigezo/status/1146944325684621312 https://twitter.com/shigezo/status/1146944325684621312 (the initial tweet had an error on this)